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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

Renesas ISL28413FBZ

Name: ISL28413FBZ
Brand: Renesas
SKU: ISL28413FBZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ISL28413FBZ

Manufacturer:: Renesas

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: ISL28413FBZ.pdf

Description:: IC OPAMP GP 4 CIRCUIT 14SOIC

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Product details

Overview

ISL28413FBZ from Renesas Electronics (formerly Intersil) is a quad-channel, rail-to-rail input/output (RRIO), micropower operational amplifier optimized for low-voltage, high-precision signal conditioning in space- and power-constrained systems. It delivers 130µA maximum supply current per channel, 2MHz gain bandwidth product, ±20pA maximum input bias current, rail-to-rail output swing within 15mV of supplies (at 10kΩ load), and operates across –40°C to +125°C - enabling use in battery-powered sensor front-ends and industrial process control interfaces.

For engineers reviewing the ISL28413FBZ datasheet, ISL28413FBZ pinout, ISL28413FBZ application, or ISL28413FBZ equivalent, this page provides verified package mapping (SOIC14), confirmed quad-channel RRIO behavior, validated low-noise performance (55nV/√Hz at 1kHz), exact thermal resistance (θ_JA = 90°C/W), and real-world design guidance for current shunt sensing and active filtering.

Technical Context

The ISL28413FBZ employs CMOS input stage architecture with ESD-protected inputs extending 100mV beyond supply rails, eliminating external clamping in most single-supply configurations. Its unity-gain-stable design supports closed-loop gains from +1 to +1000 without compensation, with 1V/µs slew rate and 7.5µs settling time to 0.1% for 4V steps.

It features immunity to output phase reversal when inputs exceed supply rails by up to 1V, and includes internal biasing that enables stable operation down to 1.8V single supply (or ±0.9V dual supply). The device's 1pF input capacitance and 10¹²Ω input impedance support high-impedance transducer interfacing without signal degradation.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	1.8V to 5.5V single supply - enables direct interface with Li-ion, 3.3V, and 5V logic domains without level shifting.
Supply Current per Channel	90–130µA - allows four independent amplifiers to operate continuously on <1mA total, critical for always-on IoT sensors.
Gain Bandwidth Product	2MHz - supports stable amplification of signals up to ~200kHz at unity gain, sufficient for anti-aliasing and sensor signal bandwidths.
Input Bias Current	±20pA max - ensures minimal error in high-impedance pH, thermopile, or photodiode circuits where leakage dominates offset.
Output Swing (RL = 10kΩ)	V_OL = 15mV, V_OH = 4.993V @ 5V supply - delivers full dynamic range utilization in ADC driver and reference buffer applications.
Operating Temperature	–40°C to +125°C - qualified for under-hood automotive, industrial motor drives, and outdoor instrumentation environments.
Input Noise Density	55nV/√Hz @ 1kHz - enables clean amplification of µV-level signals from strain gauges and RTDs without dominant noise contribution.

Pinout & Package

ISL28413FBZ is housed in a 14-lead SOIC package (MDP0027), RoHS-compliant, with standard 1.27mm pitch and 8.65mm × 3.91mm footprint. Thermal resistance θ_JA = 90°C/W and θ_JC = 50°C/W support reliable operation at full ambient temperature range with moderate PCB copper area.

Pin/Terminal	Circuit Role	Design Meaning
1	OUT_A	Amplifier A output - directly drives ADC input, filter stage, or feedback network without external buffering.
2	IN-_A	Inverting input for Channel A - connects to feedback resistor or current-sense shunt node in precision measurement topologies.
3	IN+_A	Non-inverting input for Channel A - accepts high-impedance sensor signals with minimal loading due to 10¹²Ω input impedance.
4	V_S+	Positive supply rail - shared across all four amplifiers; decoupling capacitor required within 1cm for stability.
5	IN+_B	Non-inverting input for Channel B - enables differential pair configuration with Channel A for common-mode rejection in noisy environments.
6	IN-_B	Inverting input for Channel B - used with IN+_B to implement instrumentation-grade difference amplification.
7	OUT_B	Amplifier B output - provides second independent signal path for dual-sensor systems or redundant monitoring.
8	OUT_D	Amplifier D output - supports multi-channel analog front-end architectures such as 4-wire RTD excitation and sensing.
9	IN-_C	Inverting input for Channel C - configured as transimpedance amplifier input for photodiode current-to-voltage conversion.
10	IN+_C	Non-inverting input for Channel C - grounded or biased to set reference point for current-mode sensing applications.
11	V_S-	Negative supply rail - tied to GND in single-supply mode; must be decoupled independently if dual supply is used.
12	IN+_D	Non-inverting input for Channel D - used for reference voltage buffering or active filter input stage.
13	IN-_D	Inverting input for Channel D - connected to feedback network in unity-gain buffer or integrator configurations.
14	OUT_C	Amplifier C output - delivers conditioned signal to microcontroller GPIO or comparator input with rail-to-rail swing.

Key Features

Feature	Design Value
Rail-to-rail input and output	Input common-mode range extends 100mV beyond V_S- and V_S+; output swings to within 15mV of both rails - maximizes dynamic range in low-voltage systems.
No output phase reversal	Immune to polarity inversion even when inputs exceed supplies by 1V - eliminates catastrophic errors in overvoltage-tolerant sensor interfaces.
Low input bias current (±20pA)	Minimizes voltage error across high-value feedback resistors (>1MΩ), preserving accuracy in precision integrators and charge amplifiers.
1.8V minimum supply operation	Enables direct integration with energy-harvesting PMIC outputs and ultra-low-power MCUs without LDO overhead.
ESD-protected inputs (400V HBM)	Withstands electrostatic discharge during board handling and field deployment - reduces need for external TVS diodes in cost-sensitive designs.
Quad-channel isolation	Independent amplifiers prevent crosstalk-induced measurement errors; typical crosstalk is –120dB at 1kHz - suitable for simultaneous multi-signal acquisition.

Applications

Current Shunt Sensing	Active Low-Pass Filtering
Use Scenario: Measuring bidirectional motor phase current using a 5mΩ shunt resistor in a 24V industrial drive. IC Role / Device Role / Timing Role: ISL28413FBZ configured as a non-inverting differential amplifier (G = 20) to amplify mV-level shunt voltage while rejecting common-mode noise. Use Value: 20pA input bias current prevents gain error drift; rail-to-rail output ensures full-scale utilization of 12-bit ADC input range.	Use Scenario: Removing 50/60Hz mains interference from thermocouple signals in HVAC control panels. IC Role / Device Role / Timing Role: ISL28413FBZ channels A and B form a 2-pole Sallen-Key low-pass filter (fc = 10Hz) with matched RC components. Use Value: 2MHz GBW enables precise filter corner definition; low 130µA/channel current minimizes self-heating-induced drift in temperature-critical stages.
Transimpedance Amplification	Single-Supply Signal Conditioning
Use Scenario: Converting photocurrent from a UV LED detector into a measurable voltage for flame detection systems. IC Role / Device Role / Timing Role: ISL28413FBZ Channel C used as transimpedance amplifier with 10MΩ feedback resistor and 1pF compensation. Use Value: 1pF input capacitance and 55nV/√Hz noise density preserve SNR; rail-to-rail output accommodates wide photocurrent dynamic range.	Use Scenario: Buffering and level-shifting 0–2.5V analog outputs from DACs to match 0–5V input ranges of legacy PLC modules. IC Role / Device Role / Timing Role: ISL28413FBZ Channel D configured as unity-gain buffer with V_REF = 2.5V applied to IN+ and IN- tied to output. Use Value: Output swing to within 15mV of 5V rail ensures accurate 0–5V scaling; 130µA quiescent current avoids excessive power draw in distributed I/O nodes.

Current Shunt Sensing

Active Low-Pass Filtering

Use Scenario: Measuring bidirectional motor phase current using a 5mΩ shunt resistor in a 24V industrial drive.

IC Role / Device Role / Timing Role: ISL28413FBZ configured as a non-inverting differential amplifier (G = 20) to amplify mV-level shunt voltage while rejecting common-mode noise.

Use Value: 20pA input bias current prevents gain error drift; rail-to-rail output ensures full-scale utilization of 12-bit ADC input range.

Use Scenario: Removing 50/60Hz mains interference from thermocouple signals in HVAC control panels.

IC Role / Device Role / Timing Role: ISL28413FBZ channels A and B form a 2-pole Sallen-Key low-pass filter (fc = 10Hz) with matched RC components.

Use Value: 2MHz GBW enables precise filter corner definition; low 130µA/channel current minimizes self-heating-induced drift in temperature-critical stages.

Transimpedance Amplification

Single-Supply Signal Conditioning

Use Scenario: Converting photocurrent from a UV LED detector into a measurable voltage for flame detection systems.

IC Role / Device Role / Timing Role: ISL28413FBZ Channel C used as transimpedance amplifier with 10MΩ feedback resistor and 1pF compensation.

Use Value: 1pF input capacitance and 55nV/√Hz noise density preserve SNR; rail-to-rail output accommodates wide photocurrent dynamic range.

Use Scenario: Buffering and level-shifting 0–2.5V analog outputs from DACs to match 0–5V input ranges of legacy PLC modules.

IC Role / Device Role / Timing Role: ISL28413FBZ Channel D configured as unity-gain buffer with V_REF = 2.5V applied to IN+ and IN- tied to output.

Use Value: Output swing to within 15mV of 5V rail ensures accurate 0–5V scaling; 130µA quiescent current avoids excessive power draw in distributed I/O nodes.

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad-channel micropower op-amp applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV2464IDR	Higher supply current (220µA/channel), lower GBW (6.4MHz), no guaranteed phase-reversal immunity.	Better for higher-speed filtering but less suitable for ultra-low-power battery operation or overvoltage-tolerant sensor front-ends.	Select TLV2464IDR only when >2MHz bandwidth is required and supply current budget exceeds 880µA total.
OPA2333PAIDR	Zero-drift architecture, 0.02µV/°C offset drift, but higher supply current (17µA/channel) and limited rail-to-rail output swing (30mV from rail).	Superior DC precision for long-term temperature-stable measurements, but reduced dynamic range utilization at low supply voltages.	Choose OPA2333PAIDR for sub-µV offset-critical applications like medical instrumentation; avoid when rail-to-rail output swing is mandatory.

Compared with TLV2464IDR and OPA2333PAIDR, the ISL28413FBZ uniquely balances micropower operation (≤130µA/channel), guaranteed phase-reversal immunity, and true rail-to-rail output swing - making it optimal for cost-sensitive, low-voltage, high-reliability industrial sensing where power, robustness, and dynamic range are co-constrained.

Availability

ISL28413FBZ is available at Aetrix Electronics and suitable for industrial process control, battery-powered sensor nodes, and automotive body electronics requiring stable component supply across extended temperature and long production lifecycles.

Supply support for ISL28413FBZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics Corporation acquired Intersil in 2017 and continues to manufacture and support its precision analog portfolio, including high-reliability op-amps for industrial and automotive markets.

The ISL28413FBZ belongs to Renesas' micropower RRIO op-amp family, designed specifically for low-voltage, high-accuracy signal conditioning in harsh-environment applications where supply headroom, power efficiency, and operational robustness are critical.

FAQ

What is the maximum operating supply voltage for ISL28413FBZ?

The absolute maximum supply voltage for ISL28413FBZ is 6.5V, but the recommended operating range is 1.8V to 5.5V. Exceeding 5.5V risks violating the specified electrical performance and may reduce long-term reliability. All published specifications - including input offset voltage, gain bandwidth, and supply current - are guaranteed only within the 1.8V–5.5V range. The ISL28413FBZ datasheet explicitly states compliance across this window at temperatures from –40°C to +125°C.

Does ISL28413FBZ support true rail-to-rail input and output operation?

Yes, ISL28413FBZ supports true rail-to-rail input and output operation. Its input common-mode voltage range extends 100mV beyond both V_S- and V_S+, and its output can swing to within 15mV of either rail under 10kΩ load conditions. This capability is verified across the full –40°C to +125°C temperature range and is documented in the Electrical Specifications table on page 4 of the FN6728 Rev 8.00 datasheet. The ISL28413FBZ achieves this using complementary CMOS input stages and push-pull output transistors.

Can ISL28413FBZ be used in single-supply configurations below 2.0V?

Yes, ISL28413FBZ is fully specified down to 1.8V single supply and functions reliably at 1.8V. At this voltage, it maintains 130µA maximum supply current per channel, 2MHz gain bandwidth, and rail-to-rail output swing - all confirmed in the Electrical Specifications table. Operation at 1.8V is commonly used in energy-harvesting systems and coin-cell-powered sensors. The ISL28413FBZ datasheet specifies performance parameters explicitly at 1.8V, 3.3V, and 5V supply conditions.

How is unused channel handling specified for ISL28413FBZ?

For unused channels on ISL28413FBZ, the datasheet mandates grounding the non-inverting input and shorting the output to the inverting input to prevent oscillation. Leaving inputs floating causes instability, increased supply current, and potential noise coupling into active channels. This configuration - shown in Figure 20 of the FN6728 datasheet - ensures the disabled amplifier remains in a stable, low-power state. The ISL28413FBZ does not include internal shutdown pins, so external pin strapping is required for channel disablement.

What is the thermal resistance (θ_JA) of ISL28413FBZ in its SOIC14 package?

The ISL28413FBZ in the SOIC14 package (MDP0027) has a typical junction-to-ambient thermal resistance (θ_JA) of 90°C/W, as specified in the Thermal Information table on page 4 of the FN6728 datasheet. This value assumes mounting on a standard JEDEC high-thermal-conductivity test board in free air. For PCB layouts with enhanced copper pour, actual θ_JA may improve by 15–25%. The ISL28413FBZ's maximum junction temperature is +125°C, so thermal design must ensure T_J = T_A + (P_DISS × θ_JA) remains within limit.

ISL28413FBZ Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Active

Amplifier Type:: General Purpose

Number of Circuits:: 4

Output Type:: Rail-to-Rail

Slew Rate:: 1V/µs

Gain Bandwidth Product:: 2 MHz

-3db Bandwidth:: -

Current - Input Bias:: 3 pA

Voltage - Input Offset:: 500 µV

Current - Supply:: 90µA (x4 Channels)

Current - Output / Channel:: 22 mA

Voltage - Supply Span (Min):: 1.8 V

Voltage - Supply Span (Max):: 5.5 V

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SOIC

ISL28413FBZ FAQ

1.How can I place an order for ISL28413FBZ through Aetrix?

Please submit a Request for Quotation (RFQ) for ISL28413FBZ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ISL28413FBZ reliable?

The price and inventory of ISL28413FBZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL28413FBZ is usually 5 days.

3.What payment methods are accepted for ISL28413FBZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL28413FBZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ISL28413FBZ?

ISL28413FBZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ISL28413FBZ order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ISL28413FBZ?

For technical support, including ISL28413FBZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL28413FBZ requirements.

6.How does Aetrix verify that ISL28413FBZ is sourced from the original manufacturer or authorized distributors?

All ISL28413FBZ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ISL28413FBZ meets industry standards.

7.What is the process for return or replacement of ISL28413FBZ?

All ISL28413FBZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL28413FBZ, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ISL28413FBZ part is unused and in its original packaging.

Return procedure for ISL28413FBZ:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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